Looked good on the long run on H, but the same setup in quali mode with S - looked terrible.
My wild guess is that whatever happened after Austin (Mexico floor + may be other things as well) has taken the car back to 'pre-Monza' level 'struggling to find right setup' mode, and I am almost sure the higher tyre pressures and one step harder compounds w.r.t last year, are making last years' data even less helpful. With the car's setup swinging wildly across tyre compounds, they are going with blind hope into SQ, with great unpredictability about M. Hope that's not the case, but it did look like that.
OR
they did some big change within the 'long delay' between finishing the H long run and then going for the Q run on the S.
